House-heating boiler.



L. S. BUSH.

HOUSE HEATING BOILER.

APPLICATION FILED rm. 26, 1908.

Patented Feb. 8, 1910.

3 SHEETS-4113111 1.

Inventor:

L. S. BUSH.

HOUSE HEATING- BOILER. APPLICATION FILED FEB. 26, 1908.

Patented Feb. 8, 1910.

' 3 SHEETSS HEET (A 0 Inventor:

L. S. BUSH.

HOUSE HEATING BOILER. APPLICATION-FILED T11R26, 1908.

3 SHEETS-SHEET 3.

i rllll w g nun-Hm? n Patented Feb. 8, 1910.

of Milwaukee, in the county of Milwaukee -is simple in construction, economical and UNITED STATES PATENT OFFICE.

LUTHER S. BUSH, OF MILWAUKEE, WISCONSIN.

HOUSE-HEATING BOILER.

To all whom it may concern.

Be it known that I, LUTHER 'S. BUsH, a citizen of the United States, and a resident and State of \Visconsin, have invented certain new and useful Improvements in House- Heating Boilers, of,which the following is a specification.

This invention,relates to improvements in house heating boilers and the object of my invention is to provide a new and improved house heating boiler which can be used for 1 water or low pressure steam, which boiler effective in use and is compact. 1

In the accompanying drawings, in which like characters of reference indicate like parts 1 in all the figures:Figure 1 is a side elevation of my improved heating boiler, parts being broken away and parts shown in section. Fig. 2 a detail sectional View of part of the lowest section of the interior of the boiler, snowing a slight modification. Fig. 3 is av plan view of the top of the intermediate section of the boiler. Fig. 4; is a side view of the intermediate section of the 1 boiler. Fig. 5 is a view of the underside of g the intermediate section of the boiler. Fig. G is a plan view of-the bottom section of t the boiler. Fig. 7 a longitudinal vertical 1 sectional view of the bottom section of the boiler. Fig. 8 is a vertical sectional view of a modified form of the bottom section, parts being in elevation. Fig. 9 is a horizontal sectional view on the line a; of Fig. 8, showing the cleaning device used with the modification shown in Fig. 8. Fig. 10 is a vertical sectional view showing a modified form of the fire box.

The entire boiler rests upon a base 1 provided with one or more doors 2 for removing the ashes from the pit formed and bounded by said base. The grate} 'is annular in shape and of any suitable construction and supported on the top of the base 1. The fire pot 4 which is annular in shape,- rests upon the base and is provided with a i series of vertical slots in its lowest pori tion which slots form draft openings. The i water space of the boiler is formed of a bottom section 6, intermediate section 7 and a top section -8. The bottom section 6 as shown in Fig. 7 is composed of an annular chamber havmg an outer wall 9 and an inner wall 10, the said walls 9 and being con-. nectedat the top and bottom so asto form Specification of Letters Patent.

Application filed February 26, 1908.

Patented Feb. 8, 1910.

Serial No. 417,814. a

this closed chamber. The inner wall 10 forms the boundary for a line 11 for the products of combustion and the diameter of this lower section 6 as well as the flue 11 increases gradually from the bottom to the top. Stay bolts 12 .are preferably provided between the two walls 9 and 10. Draft openings 13 are formed in the lower part of this bottom section (3 in the form of vertical slots in the outer wall 9 and inner wall 10 which slots are surrounded by a wall 14 uniting the inner and outer walls 9 and 10.

Openings 15 are formed in the bottom part of the bottom section 6 and in said openings the water supply pipes or' cold water pipes 16 are secured which pass from the bottom of this bottom section 6 directly beneath the grate 3 through the ash pit and through suitable openings in the base 1 to be connected with the circulating pipes of the heating system. The top 17 of the lower section which top unites the outer and inner wall of this bottom section, is provided with a series of segmental openings '18 and in the portions of this top 17 between said openings 18 tapped holes 19 are provided for a purpose that will appear hereinafter. The intermediate section 7 which is shown in the drawings, on a smaller scale than the bottom section 6, is circular in shape and is provided on its underside with a hollow inverted conical projection 20 through which a central draft opening 21 is formed which is open at the top and bottom and which at the bottom is of the same diameter as the upper end of the draft. fiue 11 in the lower section (3 so as to register therewith, as appears from Fig. 1. The bottom edge of the tapered portion 20 of the intermediate section 7 fits on the top 17 of the bottom section 6 and the two are united by screw bolts 22 passed through openings in the bottom of the tapered portion 20 and screwed into the tapped holes 19 in the closed top portion 17 of the bottom section 6, as shown in Fig. 1. To permit of turning these screws, openlngs 23 are formed in the top wall of the intermediate section and are closed by screw plugs 24:" so that when these screw lugs are removed a tool of suitable lengtl ii can be inserted through the holes 23 for turning the bolts 22. Within this intermediate section 7 four more or less,'segmental draft flues are formed which extend from the flat I top to the Hat bottom portion of the sec tion 7 outside of the tapered bottom part. The top section 8 of the boiler is of the same diameter as the intermediate section 7 and t 1 from which it passes to the radiators of the plate 26 provided with a screw neck 27 for 'attachingthe outflow pipe for the hot water or steam and this section may likewise be provided with a similar opening 28 in its is provided with an upwardly curved top side. The bottom of the top section 8 is curved upward to form a dome or battle plate 29 which extends to near the outer edge of this upper section. For the purpose of connecting the intermediate section 7 and the upper section 8 two or more water legs 30 are provided which are held by screws on the sides of the section 7 and 8, which sections are provided with holes 32 and 31 that communicate with the water leg so that the water can pass from one section to the other through these two water legs. Between the top of the fire box 4 and that portion of the bottom of the intermediate section 7 outside of the central tapered part 20, the draft box 32 is located which is provided with a suitable opening 33 for attaching the exit pipe, and this draft box is closed at its bottom by a horizontal partition 34 and its top is formed by the horizontal portion of the intermediate section 7 and the inner wall of this draft chamber is formed by the tapering bottom part of the intermediate section. A sheet metal jacket 35 surrounds the. fire pot and is provided with draft openings 36 which can be closed by a curved grating 37 through which draft openings the air can pass to the slots 5 in the fire pot. This casing 36 is provided with one or more fuel doors 38 through which the fuelis filled into the fire pot.

As shown in Fig. 2 the bottom section t) is provided at its bgttom withaa ledge 39 upon which a fire gi'ate lining it) can rest which lining may extend a greater or less distance upward into the central flue formed in thebottom section. The burning fuel rests upon the grate and the products of combustion pass through the. slots 13 in the bottom section of the boiler into the 'central fine 11 and from thesame through the central fine 21 formed in the intermediate section 7 and in passing upward strike the dome or battle plate 29 and are deflected-laterally and to the downwardly extending draft fines in the intermediate section from the lower ends of which they pass into the draft box 32 about the middle of the hei 'ht of the boiler and then pass ofi' through the exit pipe. Incoming water passing through the pipes 16 is heated to a certain extent by passing through the hot ash pit and by the radiation from the tire on the grate and this water rises through the space between the walls 9 and 10 of the bottom section and through the registering openings 18 in the bottom section and in the intermediate Section, into said intermediate sect-ion and surrounds the draft fines 95' and through the water legs passes into the top section 8 heating system and then through suitable return pipes back to the pipes 16 and so on.

In the modification shown in Figs. 8 and 9 the bottom section of the boiler is formed of. a downwardly tapering upper portion il, a bottom portion 42 with. which the pi cs 16 are connected in the manner previous described and the parts ail and t2 are connected by a circle of vertical pipes i3 so that the alter can pass from the part 41 to the part 42 through said pipes and the openings 0 between these pipes form the passages for the products of combustion from the tire pot to the central fine. For the purpose oi: cleaning the space between the pipes, a circular frame it is placed loosely in this flue and is provided with a series of radial arms 45 so that. one passes between each two pipes i3. By means of a suitable lIllPlQ: ment such as a poker or the like, this frame it can be raised or lowered so as to remove clinkers ashes or other deposits from between the pipes 43. In other respects the boiler is constructed in the manner shown above. As shown in Fig. 10 the walls of the tire pot are made hollow so to form closed water chambers-5O through which the draft slots 51 are formed. These chambers are connected at the bottom by a suitable pipe 52 with the return pipe. 16 and at the top by a pipe 53 with either the water space in the bottom or intermediate section of the boiler.

Having describedmy invention what i claim as new and desire to secure by Letters Patent isz 1. A heating boiler constructed with a bot tom section having a, central fiue, and a water chamber, a tire pot surrounding said section, said section having slots for establishing communication between the fire pot and the central flue formed in said section and a grate at the bottom of the fire pot beneath. which grate the lower part of said section extends and return pipes connected with that part of the bottom section projecting neath the grate, substantially as set forth.

2. A heating boiler constructed with a bottom section having a central fine and a water chamber, a tire pot surrounding said section,

said section having slots for establishing communication between the fire potand the central flue formed in said section and a grate at the bottom of the fire pot beneathwhich grate the lower part of said section extends, and return pipes extending across the grate directly beneath the underside of the same and connected with thatpart of the bottom section projecting beneath the grate, substantially as set forth.

3..In a heating boiler, the combination with a fire box, of a bottom section having a central fiue open at the top and bottom, an intermediate section resting upon the bottom section and having a tapering bottom projection of less diameter than the top of the intermediate section, which intermediate section also has a central draft flue and a series of vertical draft flues surrounding the central flue and terminating at their lower ends in the flat portion of the intermediate Section surrounding the central bottom part and a draft box formed between the top of the bottom section and the bottom of the intermediate section, saidbottom and intermediate sections forming water spaces which are in communication with each other, substantially as set forth. I

4. The combination with a fire box, of a bottom water section having a central draft flue open at the top and bottom, an intermecommunicating at their lower ends with the surrounding draft box, and a top section secured on the top of the intermediate section and'forming a baflie plate above the upper end of the vertical fine and the fines surrounding. the central flue, substantially as set forth.

Signed at New York city in the county of New York and State of New York this 20th day of Feby. A. D. 1908.

LUTHER s. bUSH.

S. M. BAEDER. 

